Jane is busy with typing, but her working efficiency is very low. She is eager for help from her friend Catherine. Please on behalf of her, finish this letter of seeking help.

A.sales 
B.bargains 
C.selling 
D.trading

A. Reagan lost a lot of support late in his administration
B. leaders should learn to win support for their policies
C. it is up to the leaders to determine the value of public opinion
D. public opinion polls are very important to a democratic society